Safety guard for sheave blocks



MINOR March 23 1922 Z SAFETY GUARD FOR sHEAy E BLOCKS Filed April 14,1924 INVENTOR. 51w?" STIWYLEY Maven A TTORNY.

Patented Main 23, 1926.

arr 1 BURT STANLEY MINOR, OF L OS ANGELES, CALIFORNIA.

SAFETY GUARD FOR SHEAVE BLOCKS.

Application filed April 14, 1924. Serial No. 708,325.

To all 107mm, 515 may concern.

Be it known that I, BURT STANLEY MINOR, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented a new and useful Safety Guard for SheaveBlocks, of'which the following is a specification.

This invention relates to safety guards for sheave blocks, to preventcatching of ones limbs or clothing or any other object in the sheaves oftheblock and causing injury thereto.

An important object of the invention is to provide a safety guard forsheave blocks constructed of a plurality of sections which may beseparately secured to or removed from the block, thus facilitating thehandling of the guard, inasmuch as the individual sections are lighterand more easily handled than the entire guard.

Another object is to provide a sectional safety guard having itssections divided through the run-way or cable holes, so

that the sheaves maybe spooled by removing only one of the sectionsinstead of the entire guard.

Another object is to provide a sectional safety guard for sheave blocksinone section of which the oiling system of the block may be supported,while another section may be removed for respooling the sheaves, thusmaking it possible to respool the sheaves without disturbing the oilingsystem.

' Another object is to provide a safety guard having cable slots orrunways therein of such formation as to enable the sheave block to betipped at an angle of not less than live degrees (5) in any direction.

A further object is to provide asectional safety guard with one sectionhinged so that it may be swung clear from an adjoining section tofacilitate spooling and to eliminate the necessity of removing andreplacing nuts and bolts when spooling the sheaves.

Other objects and advantages will be clearly apparent from the followingdescription, reference being had to the accompanying drawings forming apart thereof, in which:

Fig. 1 is a side view of the guard secured on a sheave block.

2 is a front view of the guard.

Fig. 3 is a vertical longitudinal section of my guard taken on line 3-=3of 25 Fi 1 is a horizontal section of in T uard taken on line 4i of Fig.3.

One-of my guards may be placed on each side of the sheave block as shownin Fig. l. The guard comprises a casing 10 formed with a front wall 11and side Walls 12, and it is divided into a plurality of superimposedsections 13 and l-t by a line of separa tion 15, \vhicl'r is cut in theside walls 12 near the upper end of the casing from the rearedqesthereof forwardly to the front wall 11 and across'the front wall. Theline '15 being near the upper end of-the casing, provides a lowersection 13 of relatively considerable length and an upper section 14; ofrelatively short length. the present embodiment of the invention isdivided into two sections, but it could be divided into a greater numberof sections if desirable within the scope of my invention. a r

The guard in The front wall 11 extends straight vertically for a portionof its length as inclicated at 16. From the lower end of the straightportion 16 the wall 11 is inclined inwardly and downwardly'to' a point-1,7 near the lower end and rear edges of the side walls 12 of thecasing, iEI'OlIIWlllGll point the wall extends straight down a shortdistance as indicated at 18 nearly to the lower end of the side walls 12of the casing. From the upper end of the straight portion 15 the frontwall 11 is arched upwardly and rearwardly as indicated at 19 to a point20 nearthe rear edges of the sidewalls of the casing, from which pointthe wall ex;- tends straight upwardly as indicated at 21 to the upperend of the casing. The lower ends 22 of the side walls 12 extenddownwardly a short distance below the lower edge of the front wall 11,which ends are provided with apertures 23. Lugs 24: extend inwardly fromthe upper end of the lower section 13 from the side walls 12 at rightangles to said walls a short distance forwardly of therear edgesthereof, and in alignment with the lower straight portions 18 of thefront wall 11, which lugs are provided with screw apertures 25. Thelower section 13 .of the casing is placed on the body 26 of the block27, with the rear portions of the side walls 12 fitting over the sidesof said body and the lower front wall portion 18 and lugs 2 trestingagainst the front edge of said badly in such position that the section13 encloses the sheaves 28 of the block with proper clearance betweenthe periphery of the sheaves and the front wall 11. Screws 29 and 30 aredriven through the apertures 23 and and screws 31 are driven throughapertures 32 in the lower front wall portion 18 into the block body 28,whereby the lower section 13 is secured on the block, being pivotallysecured at its lower end to the block by the screws 29.

. Lugs 33 provided with apertures 53% are formed on the upper section isat the lower edge thereof, in alignment with the portion 21 of frontwall 11, which lugs extend inwardly from the side walls 12 at rightangles thereto a short distance forwardly of the rear edges of said sidewalls. The section 14 is placed on the block 27 immediately abovesection 13, with the rear portion of its side walls 12 fitting over thesides of the block body 26 and with the front wall portion 21 and lugsfitting against the front of the block body 26. Screws 35 are driventhrough the lug apertures 34: and screws 36 are driven through apertures37 invthe front wallportion 21 into the block body 26, whereby thesection 14tis secured on the block. Cable slots 38 are provided in thearched portion 19 of the front wall 11 of the casing, extendinglongitudinally in the direction of curvature of said wall, with the lineof division 15 extending transversely through the slots, the lowerportion of which openings being located in the upper edge of the frontwall of the lower section 13, and the upper edge of the slots beinglocated in the lower edge of the front wall of the upper section 14. Thelower and upper edges 39 and 4C0 of the cable slots 38 extendtangentially to the periphery of the sheave wheels 28 so as to enablethe sheave block to be tipped at an angle of not less than five degreesin either direction without causing the cables to engage the ends oftheslots. The cable slots 38 are located forwardly of the lugs 2 1 and 33so that access may be had through said slots into the upper part of thecasing 10 for driving the screws and through the apertures 24- and 3a insaid lugs into the block body 26, or for removing said screws. Openings4:1 and 4-2 are provided in the front wall 11. of the lower section 13and openings 4% are provided in the side walls of the lower section forlightening the device.

Apertures 414 are provided in the front wall of the upper section 1tbetween the slots 38 through which apertures are extended the ducts ofthe oiling system of the block.

Upon removing the screws 81 the lower section 13 may be swung forwardlyon the screws 29 as pivots, as shown in dotted lines in Fig. 8, openingthe upper part of the casing 10 so that the sheaves may be easily theoiling s;, s

spooled through said open part of the easing, thus enabling the block tobe spooled without removing the entire g 'uard and without disturbingthe upper section 1-l an l c0111 of the block. v

lVhat I claim is:

1 A guard for sheave blocks comprising a casing provided with cableslots through which the block cables may be extended,

said guard beiili divided transversel into L o J and mean sections onthe Of the Sheaves sections through said slots, independently securingsaid sheave block over the face of the block.

2. A guard for sheave blocks comprising a casing provided with cableslots through which the block cables may be extended, said guard beingdivided into sections through said slots, means for independentlysecur'ng said sections on the sheave block over the sheaves of theblock, and pivot means for pivotally securing one of said sections tothe block so that said section may be swung outwardly from the block ponrcin oving the first of said securing means of said section for openingthe casing at line of division for spooling the sheaves.

3. A guard for sheave blocks comprising a casing provided with cableslots through which the block cables may be extended, said guard beingdivided into sections through said slots, and means for independentlysecuring said sections on the sheave block over the sheavesv of theblock, so that one of the sections may be removed for spooling thesheaves, another section being provided with openings through which theinlets of the oiling system of the block are extended.

41. A guard for sheave blocks comprising a casing formed with a frontwall andside walls, the front wall inclining rearwardly toward its'lowerend to a point a short distance forwardly of the rear edges of the sidewalls and the front wall being arched upwardly and rearwardi to a pointa short distance forwardly of said rear edges of said side walls, thecasing being provided with cable slots in said arcued portion of thefront wall, the casing being divided into sections through said cableslots, lugs on the upper end. of the side walls of the lower sectionthrough which screws inaybs driven into the front of the sheave block,the lower ends of the side walls of the casing being provided withapertures through which screws may be driven into the sides of thesheave bloclr on which screws the lower section may .be swung forwardlyupon removal of the screws from said lugs, and means for securing theupper section on the block.

5. A guard for sheave blocks comprising a casing formed with a frontwall and side walls, the front wall inclining r'earwardly toward itslower end to a point a short dis- ,57'7,so4 Y 3 tance forwardly of therear edges of the side walls and the front wall being arched upwardlyand rear wardly to a point a short distance forwardly of said rear edgesof said side walls, the casing being provided with cable slots in saidarched portion of the frontwall, the casing being divided into sectionsthrough said able slots, lugs on the upper end of the side walls of thelower section through which screws may be driven into the front of thesheave block, the lower ends of the side walls of the casing beingprovided with apertures through which screws may be driven into thesides of the sheave block on which screws the lower section may be'swungforwardly upon removal of the screws from said lugs, means for securingthe upper section on the block, and

lugs on the side walls of the upper section through which screws may bedriven into the block, the lugs on both of said sections being locatedinside the casing opposite said cable slots.

6. A. guard for sheave blocks comprising a casing formed with a frontwall and side walls, the front wall inclining rearwardly toward itslower end to a point a short distance forwardly of the rear edges of theside walls, and the front walls being arched upwardly and rearwardly toa'point a short distance forwardly of said rear edges of said 1 thelower section through which screws may be driven into the front of thesheave block, the lower ends of the side walls of the casing beingprovided with apertures through which screws may be driven into thesides of the sheave block on which screws the lower section may be swungforwardly upon removal of the screws from the lower endpor tion of thefront wall and from said lugs.

In witness that I claim the foregoing I have hereunto subscribed my namethis 8th day of March, 1924. I

BURT STANLEY MINOR.

